Shimano BB-MT800 Manual - Page 23
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MAINTENANCE
Replacing chainrings
FC-M617 / FC-M617-B2 Double chainring type
With the marked side of the largest chainring facing outward, set the largest chainring so
that the chain drop prevention pin is positioned under the crank arm.
1
(C)
Set the smallest chainring so that the marked side faces inward and the alignment tab is
positioned under the crank arm.
2
(B)
(A)
(B)
(A)
23
(A)
Mark
(B)
Crank arm
(C)
Chain drop prevention pin
Tightening torque
12 - 14 N·m
(A)
Crank arm
(B)
Alignment tab
Tightening torque
16 - 17 N·m